Light-projecting apparatus.



PATBNTBDMAY 1, 190e.

No. 819x511,-

- E. W. SGHLBBRG.

LIGHT PROJBGTING APPARATUS.

APPLICATION FILED 1320.30. 1904.

6 SHEETS-SHEET l;

' PATENTED MAY l, 1906.

E. WL SOHLBERG.

LGHT PROJEGTING APPARATUS.

APPLICATION YILED 13110.30, 1904.

6 SHEETS-SHEET 3,

'inventor v 4 attorney y No. 819,611. 131111131111111 M1111, 190eWitnesses;

E.. W. SQHLBBRG.

1.111111 PROJBGUNG APPARATUS.

APPIQIGATION FILED 1126.30. 1904.

6 SHEETS-SHEET 4..

1 nventor,

Erlernen No. 819,611. vPAEDVFiD MAY 1, 1906. E. W. SOHLBERG.

LIGHT PRUJBGTING APPARATUS.

APPLICATION TILED Dnc, 3Q. w04.

G SHEETS-SHEET l` 'narran-screams yrr onirica.

annoso w. sostenne, or "remises cirr. nrssounr, Assienoaor Two- 'rinans'ro Marinai 'tenteranno Josnrn L. armeni., or KANSAS 51o. 131531,61 ll.

To all [rr/1,0711l it 71ml/ cmtcervt.-

Be tknown that l, EDMonn W. Sonreane, a citizen of the United States,residing at Kansas City, in the county of Jackson and State of Missouri,have invented certain new and useful improvements in Li lit-ProjectingApparatus', of which the fo lowing is va specification. My inventionrelates to improvements in :light-projecting apparatus. lt relatesparticularly to imgrovements in spotlights, such as are used int eatersfor projecting diiierentcolored lights upon a person moving 'about thestage. f

The object of my invention is to provide an apparatus by whiehanoperator located at a point distant from the light-projecting mechanismf-as, Jfor instance, from some place on the stage-mayquiclrly'change the direction, co or, and 'focusing oi the rays ofprojected light.

lVith my invention an operator concealed on the stage'may` cause therays of light to be projected upon and moved to and iro with any figuremovingV about the stage. The same operator may at thesame time color therays of light to produce the light effects desired. At the same timetheoper'ator may adjust the lightffocusing mechanism so as to produce aspot of light of any desired size.

My invention provides a lighteinclosing casing having an outlet for therays of light, an adjustable focusing mechanism movable with the casing,a coior-changing mechanism for intereepting the focused rays of light,and means by which an operator at a' point distant from the casing mayswing the same vertically and laterally, adjust the focusing mechanism,and control the action of the color-changin mechanism.

Other nove features of my invention are hereinafter fully described andclaimed.

ln the accompanying drawings, which illustrate my invention, Figure l isa side elevation view of the light-inclosing casing, the support onwhich it is pivotally mounted, the colonchanging and the' focusing'mechanism,

and other parts adjacent theretd, Fig.'2 is a plan view of one of thecollarsiinounted on the base of the'lamp, as this portionof thespot-light mechanism may be called. Fig. 3 is a iront view, partly inelevation, partly in 'ertical section, and some oi' the parts brokenSpeccation of Letters' Patent. pnlcatioxx led Ileuember 30, wild. EerlalHc. ZlLlM'IS.`

'ratenteanay 1, ieoe.

away and removed, of' the mechanism shown in Fig. l. Fig. 4 is avertical sectional viewl taken on the irregular dotted line a b of Fig.3. Fig. 5 is a side elevation view of the elec- 'tromagnetic mechanismcontrolling the stepley-step movement of the color-wheel and a portionofl the color-wheel. Fig. 6 is a plan view of the complete mechanismmounted in'v a theatena part of the stage, balcony, and boxes of whichare represented. Fig. 7 is a diagrammatic view of the electric circuitiorming a part of the electromagnetic mechanism which controls thestep-by-step movenient of the color-wheel. Fig. 8 is a rear elevationview of theV stage ends of the cords used to control the action of thelight-pro- '-jecting mechanism, together with the counterbalance-weightsattached to the cords and the tubes in which the cords are mounted. Fig,9 isa vertical sectional view taken on the dotted line c d of AFig. 3.Fig. 1() is a vertical sectional view taken on the dotted line e f ofFig. 3. Fig. 11 is a transverse sectional view taken4 on the dotted lineg h of Fig. 4. Fig. l2 is a plan view of the balcony ends of theactuating cords and tubes and parts connected therewith. Fig. 13 is avertical longitudinal sectional view or" vthe casing and parts connectedtherewith and a modified 'form oi' the light-focusing mechanism mountedthereon. Fig. 14 is a front elevation vie-w ot the color-wheel, thecasing and parts connected therewith, and another modified-form' offocusing mechanism. Fig 15 is a vertical sectional view taken on thedotted line t' of Fig. l/l

Similar characters of reference denote similar parts.

The light-inclosing casing comprises a rectangular frame l, closed onall sides but the forward enfl, in which is mounted a longitu-ldinally-reciprocative lens-frame 2, provided with a transverse hole 3 inits forward end, over which is placed a lens si, secured. in osition bya'ring 5, mounted on the forwar en l of the lens-frame. erably in linewith the axis of the ns 4, is

as, for instance, an arc-light, the carbons 6 being 'lied toward eachother by suitable mechanism which retains the arc in the axis of thelens. When the arc-light is used, the

.lens 'e is preferably inclinedinwardly 1and,

lll/within the casing 1, preii- IOC . placed. any suitablelightjiroglucing device--` vshaft 11,'is properly adjusted to force thelock thevshaft 11 against rotation, and thus hold the lens 4 in fixedposition. At other downwardly, as shown in Fig. 4, so that the lbrightest part of the arc,'the crater in the u per carbon, will be inthe axial line of t e lens.

In Figs. 1, 3, S, 9, 10, and 1,2 is illustrated one mechanism forfocusing the light transmitter' through the lens 4 from the are 'formedby the electric current passing from one to the other of the carbons 6.A horizontal I'ack 7, eisposed longiturinally below the casing 1, 'hasits forward end secured in any suitable manner to the lower sire of theforward enf of the lens-frame 2. To the rear end of the rack 7 issecured the forward end of a coilspring S, the rear end of which issecure to a pin 9, secured to tnc unr'er Sife of the casing 1. Thespring 8 normally tent's to retract the lens-frame 2 inwarCly in theeasing, To i force the lens-frame forward, I proviI e a pinion 10, whichmeshes with the rack 7 an is rigif ly secured on a horizontaltransverse` shaft11, rotatively mountef' in bearings 12, provid edl onthe uncer sie of the casing 1. A sleeve 1.3 is mounted on the outer enof the shaft 11 and is provided with a longitufinal slot 14, in. whichis niountei a pin 15, secured to the shaft 11. The inner end of thesleeve 13 is adaptee tolbear against the outer si `e of the ougterbearingl 12 when the wing-nut 16, mounted onthe outer threaded end'ofthe sleeve 13inwaroly. 'lhe said nut is so anljust-ed only at such timesas it 1s desired to times the wing-nut 16 is loose on the shaft. Inorder to rotate the shaft 11 by hand by a person located adjacent thecasing, the sleeve 13 has secured to it a hand-wheel 17. To adjust thefocusing mechanism from a point distant from the easing 1, as from apoint on the stage, the sleeve 13 is provided with a grooved portion,forming a drum 18, to which is secured une end of a cord or similardevice 19, which passes from the un `er side `of the drum over a pulley20, rotatively mounted on one of the .horizontal trunnionpins' 21, whichsupport the casing 1. A U- shaped yoke or support 22 has its upper enf'sembracing, respectively, opposite sices of the casing 1. Throughtransverse openings provided in the up er ends of the arms of the yoke22 extend orizontal truniiion-pins 2l, the inner ends of which aresecured in any desired manner, respectively, to the opposite verticalsides of the casing 1. The casing 1 is thus pivoted so as to swing in aVertical plane. To oscillate the casing laterally, the yoke at its lowerend is provided with a vertical stud 23, rotatively mounted in a holeprovided in a base 24, adapted to be secured to the upper side of ahorizontal shelf 25, secured, preferably, to the balcony 26 in frontofthe middle of the stage 27. A coil-l spring'28 encircles the stud 23,having one j siaeii end secured thereto and the other end secured to thebase 24. The spring 23 serves to swing the yoke 22 in one `irection in ahorizontal plane. To swing the yoke in the other direction, thefollowing mechanism is employed'. On one of the arms of the yoke 22 issecured the inner end of a horizontal pin 29, to the outer end of whichis secured one end of a cord or similar device 30. 'lhe coixl 3() passesover a' pulley 31, mounted rotatively on' any suitable support, as the.balcony 26, thence downward over a pulley 32, rotatively mounted on a in33, lsecured to the balcony, thence throug i a tube 34, which is securedto the forward side of the balcony and extends rearwardly to the stageand at one side thereof. To the rear end of the cord 3U is secured. acounterbalance, such as a weight 35. The coilspring 2S and the weight 35are counterbalances which act'on the cord 30 in opposite (ireetions. Bymoving the cord lengthwise in either direction the casing 1An1ay beswung laterally, the counterbaflances 28 and 35 retaining the casingstationary in such position as it may be moved to when the cord isreleased by the operator stationed on the stage adjacent the weight 35.The casing 1 is preferably mounted in the yoke 22 with a preponderanceof weight forward of the trunnion-pins 21, such weight acting as acounterbalance for swinging the forward end of the casing downward. Toswing the casing in the other direction, a cord 36 1s secured at one endto an arm 37, secured to the top and rear end of the casing 1. Saidcord4 36 passes downward around a pulley 39, mounted on a horizontal pin40, secured to the balcony 26, thence through a tubel 41, which itdisposed parallel with the tube 34 and having a counterbalance, such asa weight 42, secured to its rear end. By moving the cord 36 lengthwiseto and fro the casing 1 may be vertically oscillated, the. weight of theforward end of the casing and the weight 42 serving to retain the casingin the position to which it may be adjusted. The cord 19 passes from thepulley 20 Cownwarfly through a tube 42, secured to one of the arms ofthe yoke 22, thence around a horizontal pulley 43, rotatively mountelupon a vertical projection on the stu'l or bolt 23. The cord 19 passesthence over a horizontal pulley 44, rotatively mounted between the armsof the bifurcated forward end of the pin40, thencel into and throughatube 45, secured to the balcony parallel with the tube 34. To the innerend of the cord 1S) is secured a counterbalance comprising, preferably,a weight 46. By moving the cord 1.() to and fro the lensframe 2 may bereciprocated in the casing 1 the counterbalances 46 and spring 3 servingto reciprocate the said frame and to retain it in a position to which itmay he adjusted. Uscillator movement of the yoke 22 on the base 24 isfimited in either direction by means IOO `ustable upon the upper end `ofthe base 24.

he pro'ections 48 and' 49 extend, respectively, ownwardly and u wardly,so as to lie inthe path of the roJection 47. Each collarl is providedwit 'a set-screw 52, by.

which the collar is rigidly secured in a position to which it may beadjusted on the base 24. .By circumferentially adjusting the collars 50and 51 the horizontal swinging of the yoke 22 may be limited.

In Fi s. 14 and 15g I have illustrated va modifie form of thefocusinmechanism. In this form of my invention t e casing-'1 is provided withtwol projections 53 on the ower side thereof, provided, respectively,

each with a transverse hole through which extends a horizontal bar54,.-the ends of which. are screw-threaded and extend through openingsprovided in the up er ends 0n thet eaded secure a segmental gear 56, theteeth of which mesh with ,the rack 7, already described, said segmentalgearbeing provided on theside diametric'ally opposite its peripheralteeth with an arm 57 ,to which is secured the end of the cord 19, whichpasses thence ovei the pulle 58, rotatively mounted on the bar 54 ansecured against'longitudinal movement thereon by means of'two collars59, secured, respectively, one'at each side of the pulley 58 on the bar54.- The cord 19 passes from the pulley 58 around a vertical pulley 60,rotatively mounted between two vertical projections centrally disposedupon the upper sidev of the `yoke 22. T he cord 19 passes from thepulley 60 rearwardly over the pulley 44, hereinbefore described, andthrough the tube 45 and has secured to its rear end the weight 46. Tomove the lensframe 2 forward, the cord 19 is rearwardly pulled, thusswinging the segmental gear 56, so as to force the rack 7 forward.Retracvtion of the rack 7 and the frame 2 is obtained.

raising the weight 46, when the spring 8 willl retract the rack.

In Fig. 13 I have illustrated another form of focusing mechanism havingsome of the partscommrp to the other two forms already described. n thisform of my invention a Acord, 19 passes over the pulley/60, asdescribed,'and over the pulley 58, mounted on the transverse bar 54, theconstruction and mounting of which is already described, to

the rear endof a horizontal rod 62, to which the'cord 19 1s secured. Thesaid4 rod 62 is si'idably mounted in a transverse horizontal holeprovided in a bracket 63, secured tothe under side of the casing 1. Theforward end of the rod 62 is rigidly secured to the lower end andforward portion of the frame 2. Encircling the rod 62 is a coil-spring64, the forward end of which bears against a washer 65, mounted on theforward end of the rod62, and the rear end of which bears against theforward side of the bracket 63. In this forni of my invention to retractthe lens-fraine 2 the cord l19 is pulled rearwardly, thus retracting therod 62 and frame 2 against the pressure of the spring 64. By' raising.the weight 46 the s ring 64 will force the lensframe 2 forward? I willnow describe the light-color-changing mechanism. Mounted on the upperfor ward end of the lens-frame 2 is a bracket 66, provided with aforwardlyextending rigid stud 67 on which is rotatively mounted in frontof the bracket 66 the color-wheel 68. The said color-wheel comprises acentral hub 69, provided with radial arms 70, to the forward side ofwhich are secured, by means of screws 71, two disks 72, provided,Yrespectively,with op ositely-disposed holes 73, disposed at equadistances apart and in positions such that when the color-wheel isrotated said holes will pass consecutively in front of the lens 4. anddisposed, respectively, so as to cover the holes 73 may be slipped aseries of colored latesv 74, a part of one of which is shown in ig. 4.These plates may be lof different colors. Rotation step by step of thecolorwheel 68 may be obtained in any desired In the drawings I haveillustrated wheel is obtained.

`lteierring particularly to Figs. 1, 3, 4, 5, and 11, 75 denotes atransverse plate se- `cured to two ofthe arms 7.0 and having secured atright angles to its ends respectively two forwardly-extending posts 76,to the outer ends of which is secured a transverse plate 77. Rotativelymounted between and extending through the plates 7,5- and 77 is a shaft78, to which is secured one end of a coil-spring 7,9, which encirclessaid shaft and has its other other end secured to one of the posts 76.Rigidl' mountedon'the shaft 78 is a ratchet-wheelySO, in the teeth ofwhich engages a pawl 81, pivoted upon the forward side of the spurgear-wheel 82, i'otativel mounted upon the shaft 7 8 and meshing withthe teeth of a pinion 83, rigidly secured upon the 'forward end of thestud 67. rlhe o )pow site ends of the hub 69 are recessed and ormbearing' respectively for two series of pawls 84, the rear set of whichbear upon a cone 85, integral with the stud 67, and the forward .set ofwhich bear upon a cone 86, having a longitudinal screw-threaded holefitted to the screw-threaded. outer end oic the stud 67. A lock-nut 87,mounted'upon the outer end of stud 67, clamps the pinion 83 between saidBetween the disks 72 r roo lock-nut and the cone 86. Wvhen the spring 79is wound either by rotating the shaft 78 may not become broken in theevent that the color-wheel accidentally escapes from the. control of themechanism which governs its step-hy-step rotation. To retain the pawl 8lin engagement with the ratchet SO, a spring 88 has one end secured tethe gear 82 and the other end bearing upon the outer side of the saidpawl.

I will now describe the electromagnetic mechanism which controls thestep-by-step rotation of the color-wheel. Rigidly mounted on the bracket66is an electroni agnet St), comprising two coils forming part oi' anelectric circuit and providedwith a pivoted armature 5)() of anyordinary type. To the upper end of the armature 9() is secured aforwardlyextending arm or pawl 91,4 adapted to enter consecutively aseries ot notches 92, provided at suitable 'intervals in the rear sideof a ring 93, provided on the color-wheel68 and concentric with the stud67. The pawl 91 and the recesses 92 are so disposed that when the pawl91 is in one of said recesses one of the holes 73 of the color-wheelwill be in front ot the lens 4. To one of the coils 89 is connected oneend ot a line-wire 94, the other end of which is connected to one poleof a battery 95 or other electric generator, the other pole of which isconnected to one end of a conductor 96, the opposite end of which isconnected to a switch-lever 97, adapted to close the circuit by beingswung against a contact, connected to one end of a conductor 99, theother end et which is con-nected to the other coil of the magnet 89, thetwo magnet-coils being connected together in the ordinary manner. rl`othe lower end of the armature tl() is seeured the forward end of aretracting-spring 100, the rear end otl which is secured to anadjusting-screw 101, ['itted in a screw-threatled hole provided in aplate 102, supported in any desired mannerfrom the v bracket (ib.

*In operating in v invention the casing 1 is oscillated vertically andlaterally by moving .the cords Si() andt lengthwise in the properdirections in the manner hereinbeiore described. 'lhe lens 4. is thenadjusted to the proper position relative to the light-produc.- vingdevice in the casing l by moving the cord l?) lengthwise in the properdirection and to the place in which a spot-light of the proper size isobtained by means ol the lens ft. switch-'lever 97 is then caused tomake contact with the contact 955, thus closing the circuit in which theelectric generator 95 is located, thus energizing the magnet 89 andcausing the armature Qt) to be swung rearwardly at its upper end andwithdrawingT the paw! 91 from the notch 92, in which it is located. Thespring 7) will then cause the color-wheel to be rotated in the mannerhereinbetore described, after which the switehlever 97 wiil be swung outof contact with tne contact QS and permitting the spring 10Q toretrac't'the armature 9() and force the pawl 9i again against thenotched ring Q3, where it will en ter the next notch 92, thus stoppingrotation of the color-wheel. This operation may be repeated until thestep-b v-stcp rotation of the color-wheel has brought the plate 74 ofthe color desired before the lens 4, at which time the projected rayswill be of the color desired.

It will thus be observed that by properly opening and closing theelectric circuit .in which the magnet 8S) is located step-bysteprotation of the color-wheel may be obtained. It will be noted that asthe bracket 66 is mounted on the frame 2 the relative distance betweenthe len-s 4 and the color-wheel 68 remains the same irrespective of theoperation of the focusingr mechanism.

Having thus described my invention, what i claim, and desire to secureby Letters Patent, is-

1. In a light-projecting apparatus, thecom-- bination with a casing lorinclosing an electric or other light-producing device and hav ing anoutlet for the rays of light, a support on which the casing is pivotallymounted, a base on which the su pportis pi-votally mounted with its axisat anangle to the axis of the casing, aoeusing device movable on thecasing toward and Ifrom the light-preduc ing device, a. color-wheelrotatively mounted on the casing and adjustable with the focus* ingdevice and provided with a series of lighttransmitting devices adaptedwhen the wheel is rotated to intercept consecutively the to cused raysof light, meansI tor eliecting moveH nient to and fro oi the focusingdevice, means ioreilecting oscillation respectively of the cas= ing` andsupport, and electromagnetic means for controlling the rotation oit thecolor-wheel.

2. In a light-projecting apparatus, the com bination with a casing for`inclosing an eleo-l tric or other light-prod ucinig device, of means foreiiecting oscillation oi" said easing in' two planes disposed at anglesto .each other, a ,light-focusing device carri-ed by said casing fandadjustable toward and from the light.- produeing device, a .eolorlwheelrotatively mounted on the casing and adjustable wit i the focusingdevice and adapted to intercept the focused rays of light, n'ieans foreecting IDO 'XIS

light-producing device and having an outlet for the rays of light, of acolor-Wheel Imovable with the casing and provided with a series oflight-transmitting devices adapted to pass consecutively in front ofsaid outlet when the color-wheel 1s rotated step by step,electromagnetic means controlling the rotation of the colorwvheel, and alightefocusing device disposed so as tointercept the rays of lighttransmitted through the cuor-Wheel and adjustable with the color-wheeltoward and from the light- )reducing device.

13. In a lig itprojecting apparatus, the combination with a casing forinclosing a light-producing device and having an outlet for the rays oflight, ol means for vertically and laterally oscillating the casing, acolor- Wlreel movable with the casing and provided with a series oflight-transmitting devices adapted to pass consecutively in front ofsaid outlet when the color-Wheel is rotated step by step,electromagnetic means controlling the step-by-step rotation of thecolor-wheel', a light-focusing devicedisposed infront of said outlet andreciprocative toward and from the light-producing device, and means forreciprocating the focusing device.

14. In a light-projecting apparatus, the combination With aligl'it-inclosing casing having an outlet for the rays of light, of alightfocusing device rcciprocative toward and from a light-producingdevice adapted to be placed in the casing, a color-Wheel mounted on saidlight-focusing device and provided with a series of light-transmittingdevices adapted to pass in consecutive order before said outlet when thecolor-Wheel'is rotated step by step, means for oscillating the casing,means for reciprocating the focusing device and means for controllingthe step-by-step rotation of the color-Wheel.

15. In a light-projecting apparatus, the combination with a casing forinclosing a light-producing device, and having an outlet for the rays oflight, of a light-focusing device reciprocatively mounted on the casingin line with said outlet, a rotary color-wheel carried by the focusingdevice and provided with a series of light-transmitting devices adaptedto pass consecutively in front of said outlet when the color-Wheel isrotated step by step, means for rotating the color-wheel,electromagnetic means controlling the step-by-step rotation of the coloi-Wheel, means for reciprocating the focusing device, and means foroscillating the casing.

16. In a light-projecting apparatus, the combination with an oscillatorycasing for inclosing a light-producing device and having an outlet forthe rays of light, of a light-focusing device reci rocative toward andfrom the light-produci g device and oscillatable with the casing', acolor-Wheel reciprocative With the focusing device and )rovided with aseries of lighttransmitting evices adapted to pass consecutively infront of said outlet when the Wheel-is rotated step by step, means forrotating the color-Wheel, electromagnetic means for controlling thestep-by-step rotation of the color-Wheel, three cords or similar deviceseach reciprocative lengthwise, and means by which when said cords arerespectively reciprocated the casing may be oscillated vertically andlaterally, and the focusing device reci rocated.

17. In a light-projecting apparatus, the combination with alight-inclosing casing having an outlet for the rays of light, of alense frame reciprocatively mounted on the casing, a lens carried bysaid frame and disposed in front of said outlet, means for reciprocatingsaid lens-frame, a color-Wheel rotatively mounted on the lens-frame andprovided with a series of light-transmitting devices 'adapted to passconsecutively in front of the lens when the color-Wheel is rotated stepby step, an electromagnetic means controlling the step-by-step rotationof the color-Wheel, means for rotating the eolor-Wheeel, and means foroscillating the casing vertically and laterally.

18. In a light-projecting apparatus, the combination Withalight-inclosing casin provided With an outlet for the rays of lig it, ofmeans for focusing said rays of light., a colorwheel carried by thefocusing means and provided With a plurality of light-transmittingdevices adapted to pass consecutively in the path of the focused rays oflight, an electromagnet provided with an armature adapted to engage andcontrol the rotation of the color-Wheel when the magnet is energized,means for energizing the e ectromagnet, and means for oscillating thecasing vertically and laterally.

19. In a light-projecting device, the combination with a light-inclosingcasing provided With an outlet for the rays of light, of a support onthe casing, a colorwheel rotatively mounted on the support, and providedwith a plurality of light-transmitting devices adapted to passconsecutively before the said outlet when the color-wheel is rotatedstep by step, a st ationary pinion mounted on said support, a gear-Wheelrotati'velymounted on the colorwheel and engaging the pinion so as tohave a planetary movement around the pinion, means for rotating thegear-Wheel, and means for controlling the step-by-step rotation of thecolor-Wheel.

20. In a light-projectin apparatus, the combination with a light-incosngcasing having an outlet for the rays of light, of a support on thecasing, a color-Wheelrotatively mounted on said support and providedwith a plu: rality of light-transmitting devices adapted to passconsecutivelyin front of the said outlet, a stationary pinion mounted onsaid support, a ear-Wheel rotatively mounted on the color-W eel andmeshing Withsaid pinion and IOO disposed o'n the color-Wheel so as to.have a i planetary movement around the pinion when the color-Wheel isrotated, means for rotating the gear-Wheel, and electromagnetic meanscontrolling the step-by-step rotation of the color-Wheel.

2l. In a light-projecting apparatus, the combination with alight-inclosing casing having an outlet for the rays of light, of asupport mounted on the casing, a color-Wheel rotatively mounted on thesupport and having plurality of light-transmitting devices ad apted topass consecutively in front of the outlet when the Wheel is rotated, astationary pinion mounted on the said support concentrioally with thecolor-Wheel, a gear-Wheel rotatively mounted on the color-Wheel andmeshing with the pinion, a spring supported by the lor-Wheel, means forimpartin rotation to it e gear-wheel by the tension o said spring,

and means for controlling step-by-step rotation ofthe color-wheel.

29. In a light projecting apparatus, the combination with aliglit-inclosing casing having a light-outlet, of a support on saidcasing, a color-Wheel rotatively mounted on said support, and having aplurality of light-transmitting devices adapted to pass consecutivelybefore the said outlet When the color-Wheel is rotated, a stationarypinion mounted on said support concentrically With the color-Wheel, agear-wheel rotatively mounted on the colorcarried by the color-Wheel,means for imparting rotation to the gear-wheel from the tenment of thecolor-Wheel.

combination with a support, of a color-Wheel rotatively mounted thereon,a pinion mount- ,ed stationary on said-support concentrically with thecolor-Wheel, a gear-Wheel rntativeli; f mounted on the color-Wheeleccentrically Wit the axis of the Wheel. and meshing with said pinion,and means for imparting rotation to the gear-Wheel.

combination with a support, of a color-Wheel rotatively mounted on saidsupport, a pinion stationary on the support and concentric mounted onthe color-wheel eccentrically with the axis of said color-Wheel andmeshing Wheel, and means for controlling t e step-bystep rotation of thecolor-Wheel.

in presence of tWo Witnesses. EnMoND W. soHLBERG.

' Witnesses i i WARREN D. HOUSE,

HENRY C. LAMBERT.

sion of said spring, and electromagnetic" means controlling thestep-by-step rnove-l 23. In a light-projecting apparatus, the.

24. In a light-projecting apparatus, the

With the color-Wheel, a gear-Wheel rotatively.

With the pinion, meansfor rotatin said gear- Wheel and meshing With thepinion., a spring -v In testimonywhereof I affix my signature 4

